Java实现的数据可视化方法和实践

import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.chart.PieChart;
import javafx.stage.Stage;

public class PieChartSample extends Application {

    @Override
    public void start(Stage stage) {
        Scene scene = new Scene(new Group());
        stage.setTitle("Pie Chart Sample");
        stage.setWidth(500);
        stage.setHeight(500);

        ObservableList<PieChart.Data> pieChartData =
                FXCollections.observableArrayList(
                new PieChart.Data("Grapefruit", 13),
                new PieChart.Data("Oranges", 25),
                new PieChart.Data("Plums", 10),
                new PieChart.Data("Pears", 22),
                new PieChart.Data("Apples", 30));

        final PieChart chart = new PieChart(pieChartData);
        chart.setTitle("Imported Fruits");

        ((Group) scene.getRoot()).getChildren().add(chart);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

import javax.swing.*;
import org.jfree.chart.*;
import org.jfree.chart.plot.*;
import org.jfree.data.category.*;

public class BarChartExample extends JFrame {

    public BarChartExample() {
        JFreeChart barChart = ChartFactory.createBarChart(
                "Country vs GDP",
                "Country",
                "GDP",
                createDataset(),
                PlotOrientation.VERTICAL,
                true,
                true,
                false);

        ChartPanel chartPanel = new ChartPanel(barChart);
        chartPanel.setPreferredSize(new java.awt.Dimension(800, 600));
        getContentPane().add(chartPanel);
    }

    private CategoryDataset createDataset() {
        final String fiat = "FIAT";
        final String audi = "AUDI";
        final String ford = "FORD";
        final String speed = "Speed";
        final String millage = "Millage";
        final String userrating = "User Rating";
        final String safety = "safety";
        final DefaultCategoryDataset dataset
                = new DefaultCategoryDataset();

        dataset.addValue(1.0, fiat, speed);
        dataset.addValue(3.0, fiat, userrating);
        dataset.addValue(5.0, fiat, millage);
        dataset.addValue(5.0, fiat, safety);

        dataset.addValue(5.0, audi, speed);
        dataset.addValue(6.0, audi, userrating);
        dataset.addValue(10.0, audi, millage);
        dataset.addValue(4.0, audi, safety);

        dataset.addValue(4.0, ford, speed);
        dataset.addValue(2.0, ford, userrating);
        dataset.addValue(3.0, ford, millage);
        dataset.addValue(6.0, ford, safety);

        return dataset;
    }

    public static void main(String[] args) {
        BarChartExample example = new BarChartExample();
        example.pack();
        example.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        example.setVisible(true);
    }
}